Patents by Inventor Tsutomu Takai

Tsutomu Takai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10659002
    Abstract: An elastic wave device includes a lamination layer film including a piezoelectric thin film on a support substrate. The lamination layer film is not partially present in a region located in an outer side portion of a region where IDT electrodes are provided. A first insulation layer extends from at least a portion of a region where the lamination layer film is not present to an upper portion of the piezoelectric thin film. A wiring electrode has a width of about 6 ?m and extends from the upper portion of the piezoelectric thin film to an upper portion of the first insulation layer, and extends onto a section of the first insulation layer in the region.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: May 19, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Koji Yamamoto, Tsutomu Takai, Seiji Kai, Hisashi Yamazaki, Yuji Miwa, Takashi Yamane, Noriyoshi Ota, Atsushi Tanaka
  • Publication number: 20200007109
    Abstract: An acoustic wave device includes a silicon oxide film, a piezoelectric body made of lithium tantalate, and interdigital transducer electrodes stacked on a supporting substrate made of silicon, in which the values of the wave length-normalized film thickness and the Euler angle of the piezoelectric body made of lithium tantalate, the wave length-normalized film thickness of the silicon oxide film, the wave length-normalized film thickness of the interdigital transducer electrodes in terms of aluminum thickness, the propagation direction of the supporting substrate, and the wave length-normalized film thickness of the supporting substrate are set such that represented by Formula (1) for at least one of responses of first, second, and third higher-order modes is more than about ?2.4, and TSi>20.
    Type: Application
    Filed: September 5, 2019
    Publication date: January 2, 2020
    Inventors: Ryo NAKAGAWA, Hideki IWAMOTO, Tsutomu TAKAI
  • Publication number: 20190393856
    Abstract: An acoustic wave device includes a material layer which has Euler angles and an elastic constant at the Euler angles, a piezoelectric body which includes first and second principal surfaces opposing each other, is laminated directly or indirectly on the material layer so that the second principal surface is on the material layer side and has Euler angles, and whose elastic constant at the Euler angles, and an IDT electrode which is disposed on at least one of the first principal surface and the second principal surface of the piezoelectric body. At least one elastic constant among elastic constants C11 to C66 of the material layer not equal to 0 and at least one elastic constant among elastic constants C11 to C66 of the piezoelectric body not equal to 0 have opposite signs to each other.
    Type: Application
    Filed: September 6, 2019
    Publication date: December 26, 2019
    Inventors: Hideki IWAMOTO, Tsutomu TAKAI, Ryo NAKAGAWA, Takashi YAMANE, Masanori OTAGAWA
  • Publication number: 20190393858
    Abstract: An acoustic wave device includes a material layer with Euler angles and an elastic constant at the Euler angles represented by Expression 1, a piezoelectric body including opposing first and second principal surfaces, is laminated directly or indirectly on the material layer and has Euler angles, and whose elastic constant at the Euler angles is represented by the Expression 1 below, and an IDT electrode on at least one of first and second principal surfaces of the piezoelectric body, and in which a wave length determined by an electrode finger pitch is ?.
    Type: Application
    Filed: September 6, 2019
    Publication date: December 26, 2019
    Inventors: Hideki IWAMOTO, Tsutomu TAKAI, Ryo NAKAGAWA, Takashi YAMANE, Masanori OTAGAWA
  • Publication number: 20190393855
    Abstract: In a multiplexer, at least one acoustic wave filter includes a piezoelectric body made of lithium tantalate having Euler angles (?LT=0°±5°, ?LT, ?LT=0°±15°), a support substrate, and an interdigital transducer (IDT) electrode. A frequency fh1_t(n) of a first higher-order mode satisfies below Formulas (3) and (4) in all acoustic wave filters (m) having a higher pass band than at least one acoustic wave filter (n) (n<m?N) in at least one acoustic wave resonator among a plurality of acoustic wave resonators. fh1_t(n)>fu(m) Formula (3). fh1_t(n)<fl(m) Formula (4). Here, fu(m) and fl(m) represent the frequencies of the high-frequency end and the low-frequency end of the pass band in the m acoustic wave filters in Formulas (3) and (4).
    Type: Application
    Filed: September 5, 2019
    Publication date: December 26, 2019
    Inventors: Ryo NAKAGAWA, Hideki IWAMOTO, Tsutomu TAKAI
  • Patent number: 10491187
    Abstract: An elastic wave device includes a supporting substrate, a high-acoustic-velocity film disposed on the supporting substrate, a low-acoustic-velocity film disposed on the high-acoustic-velocity film, a piezoelectric layer disposed on the low-acoustic-velocity film, and an interdigital transducer electrode disposed on the piezoelectric layer. The acoustic velocity of a bulk wave that propagates through the high-acoustic-velocity film is higher than the acoustic velocity of an elastic wave that propagates through the piezoelectric layer. The acoustic velocity of a bulk wave that propagates through the low-acoustic-velocity film is lower than the acoustic velocity of an elastic wave that propagates through the piezoelectric layer. The high-acoustic-velocity film is composed of SiNx, where x<about 0.67.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: November 26, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Tsutomu Takai, Koji Yamamoto, Hideki Iwamoto
  • Patent number: 10469055
    Abstract: A filter device includes a longitudinally coupled resonator elastic wave filter that includes IDT electrodes including low acoustic velocity regions in outer side portions of center regions of the IDT electrodes and high acoustic velocity regions in outer side portions of the low acoustic velocity regions in a direction orthogonal or substantially orthogonal to an elastic wave propagation direction, and defines and functions as a first bandpass filter, and elastic wave resonators that are electrically connected to the longitudinally coupled resonator elastic wave filter.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: November 5, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hideki Iwamoto, Keiji Okada, Yuichi Takamine, Tsutomu Takai
  • Publication number: 20190305748
    Abstract: An elastic wave device includes a multilayer film including a piezoelectric thin film laminated on a support substrate. In a region outside a region in which an IDT electrode is provided, the multilayer film is not disposed. A first insulating layer extends from at least a portion of the region to a region on the piezoelectric thin film. A wiring electrode extends to a region on the first insulating layer from a region on the piezoelectric thin film and to extend to a region on a portion of the first insulating layer located in the region. A support layer including a cavity defining a hollow space is provided on the support substrate. The support layer includes, on the wiring electrode, a portion extending from the region to a region above an inner end of the first insulating layer.
    Type: Application
    Filed: March 29, 2019
    Publication date: October 3, 2019
    Inventors: Takashi YAMANE, Tsutomu TAKAI, Toru TAKESHITA
  • Publication number: 20190260349
    Abstract: An elastic wave device includes a SiNx layer stacked directly or indirectly on a supporting substrate made of a semiconductor material, a piezoelectric film stacked on directly or indirectly the SiNx layer, and an interdigital transducer electrode stacked directly or indirectly on at least one main surface of the piezoelectric film. In the SiNx layer, x is about 1.34 or more and about 1.66 or less.
    Type: Application
    Filed: January 8, 2019
    Publication date: August 22, 2019
    Inventors: Tsutomu TAKAI, Koji YAMAMOTO, Hideki IWAMOTO
  • Publication number: 20190260347
    Abstract: An elastic wave device includes a supporting substrate, a high-acoustic-velocity film disposed on the supporting substrate, a low-acoustic-velocity film disposed on the high-acoustic-velocity film, a piezoelectric layer disposed on the low-acoustic-velocity film, and an interdigital transducer electrode disposed on the piezoelectric layer. The acoustic velocity of a bulk wave that propagates through the high-acoustic-velocity film is higher than the acoustic velocity of an elastic wave that propagates through the piezoelectric layer. The acoustic velocity of a bulk wave that propagates through the low-acoustic-velocity film is lower than the acoustic velocity of an elastic wave that propagates through the piezoelectric layer. The high-acoustic-velocity film is composed of SiNx, where x< about 0.67.
    Type: Application
    Filed: January 10, 2019
    Publication date: August 22, 2019
    Inventors: Tsutomu TAKAI, Koji YAMAMOTO, Hideki IWAMOTO
  • Patent number: 10298274
    Abstract: A multiplexer includes filters, a common terminal with which an inductance element is connected to a connection path of the common terminal and an antenna element and a capacitance element is connected in series to the connection path, and another inductance element. An input terminal of one of the filters is connected to the common terminal via the another inductance element, and is connected to a parallel resonator. In each of the filters other than the one filter, one of the input terminal and the output terminal, which is a terminal closer to the antenna element, is connected to the common terminal, and is connected to the series resonator.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: May 21, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Yuichi Takamine, Tsutomu Takai, Yuji Toyota
  • Publication number: 20190089387
    Abstract: A multiplexer includes filters, a common terminal with which an inductance element is connected to a connection path of the common terminal and an antenna element and a capacitance element is connected in series to the connection path, and another inductance element. An input terminal of one of the filters is connected to the common terminal via the another inductance element, and is connected to a parallel resonator. In each of the filters other than the one filter, one of the input terminal and the output terminal, which is a terminal closer to the antenna element, is connected to the common terminal, and is connected to the series resonator.
    Type: Application
    Filed: November 19, 2018
    Publication date: March 21, 2019
    Inventors: Yuichi TAKAMINE, Tsutomu TAKAI, Yuji TOYOTA
  • Patent number: 10171061
    Abstract: An elastic wave device includes a low acoustic velocity film, a piezoelectric film, and an IDT electrode, which are laminated on a high acoustic velocity material.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: January 1, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hideki Iwamoto, Keiji Okada, Yuichi Takamine, Tsutomu Takai
  • Patent number: 10171113
    Abstract: A multiplexer includes filters, a common terminal with which an inductance element is connected to a connection path of the common terminal and an antenna element and a capacitance element is connected in series to the connection path, and another inductance element. An input terminal of one of the filters is connected to the common terminal via the another inductance element, and is connected to a parallel resonator. In each of the filters other than the one filter, one of the input terminal and the output terminal, which is a terminal closer to the antenna element, is connected to the common terminal, and is connected to the series resonator.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: January 1, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Yuichi Takamine, Tsutomu Takai, Yuji Toyota
  • Publication number: 20180358950
    Abstract: An elastic wave device includes a lamination layer film including a piezoelectric thin film on a support substrate. The lamination layer film is not partially present in a region located in an outer side portion of a region where IDT electrodes are provided. A first insulation layer extends from at least a portion of a region where the lamination layer film is not present to an upper portion of the piezoelectric thin film. A wiring electrode has a width of about 6 ?m and extends from the upper portion of the piezoelectric thin film to an upper portion of the first insulation layer, and extends onto a section of the first insulation layer in the region.
    Type: Application
    Filed: August 22, 2018
    Publication date: December 13, 2018
    Inventors: Koji YAMAMOTO, Tsutomu TAKAI, Seiji KAI, Hisashi YAMAZAKI, Yuji MIWA, Takashi YAMANE, Noriyoshi OTA, Atsushi TANAKA
  • Publication number: 20180241418
    Abstract: A multiplexer includes filters, a common terminal with which an inductance element is connected to a connection path of the common terminal and an antenna element and a capacitance element is connected in series to the connection path, and another inductance element. An input terminal of one of the filters is connected to the common terminal via the another inductance element, and is connected to a parallel resonator. In each of the filters other than the one filter, one of the input terminal and the output terminal, which is a terminal closer to the antenna element, is connected to the common terminal, and is connected to the series resonator.
    Type: Application
    Filed: February 22, 2018
    Publication date: August 23, 2018
    Inventors: Yuichi TAKAMINE, Tsutomu TAKAI, Yuji TOYOTA
  • Publication number: 20180102761
    Abstract: An elastic wave device includes a piezoelectric thin film provided on a low acoustic velocity film and an IDT electrode provided on the piezoelectric thin film, wherein the piezoelectric thin film is made of a piezoelectric single crystal and includes a first principal surface that is a positive surface in a polarization axis direction and a second principal surface that is a negative surface in the polarization axis direction. The first principal surface of the piezoelectric thin film faces the low acoustic velocity film, and the second principal surface faces the IDT electrode.
    Type: Application
    Filed: December 7, 2017
    Publication date: April 12, 2018
    Inventors: Tsutomu TAKAI, Atsushi TANAKA, Seiji KAI
  • Publication number: 20180097508
    Abstract: A filter device includes a longitudinally coupled resonator elastic wave filter that includes IDT electrodes including low acoustic velocity regions in outer side portions of center regions of the IDT electrodes and high acoustic velocity regions in outer side portions of the low acoustic velocity regions in a direction orthogonal or substantially orthogonal to an elastic wave propagation direction, and defines and functions as a first bandpass filter, and elastic wave resonators that are electrically connected to the longitudinally coupled resonator elastic wave filter.
    Type: Application
    Filed: December 4, 2017
    Publication date: April 5, 2018
    Inventors: Hideki Iwamoto, Keiji Okada, Yuichi Takamine, Tsutomu Takai
  • Publication number: 20180097502
    Abstract: An elastic wave device includes a lamination layer film including a piezoelectric thin film on a support substrate. The lamination layer film is not partially present in a region located in an outer side portion of a region where IDT electrodes are provided. A first insulation layer extends from at least a portion of a region where the lamination layer film is not present to an upper portion of the piezoelectric thin film. A wiring electrode extends from the upper portion of the piezoelectric thin film to an upper portion of the first insulation layer, and extends onto a section of the first insulation layer in the region.
    Type: Application
    Filed: December 5, 2017
    Publication date: April 5, 2018
    Inventors: Koji Yamamoto, Tsutomu Takai, Seiji Kai, Hisashi Yamazaki, Yuji Miwa, Takashi Yamane
  • Publication number: 20170222619
    Abstract: An elastic wave device includes a low acoustic velocity film, a piezoelectric film, and an IDT electrode, which are laminated on a high acoustic velocity material.
    Type: Application
    Filed: April 17, 2017
    Publication date: August 3, 2017
    Inventors: Hideki IWAMOTO, Keiji OKADA, Yuichi TAKAMINE, Tsutomu TAKAI